<template>
  <div>

    <div class="table">
      <el-table :data="tableData" stripe  @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="55" align="center"></el-table-column>
        <el-table-column prop="courseId" label="序号" width="80" align="center" sortable></el-table-column>
        <el-table-column prop="courseName" label="课程名称" show-overflow-tooltip></el-table-column>
        <el-table-column prop="credits" label="课程学分"></el-table-column>
        <el-table-column prop="courseContent" label="课程介绍"></el-table-column>
<!--        <el-table-column prop="url" label="课程链接"></el-table-column>-->

        <!-- URL 列，渲染为可点击链接 -->
        <el-table-column label="URL" width="300">
          <template slot-scope="scope">
            <a :href="scope.row.url" target="_blank" style="color: #409EFF">{{ scope.row.url }}</a>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180" align="center">
          <template v-slot="scope">
            <el-button plain type="primary" @click="handleEdit(scope.row)" size="mini">编辑</el-button>
            <el-button plain type="danger" size="mini" @click=del(scope.row.courseId)>删除</el-button>
          </template>
        </el-table-column>
      </el-table>

      <div class="pagination">
        <el-pagination
            background
            @current-change="handleCurrentChange"
            :current-page="pageNum"
            :page-sizes="[5, 10, 20]"
            :page-size="pageSize"
            layout="total, prev, pager, next"
            :total="total">
        </el-pagination>
      </div>
    </div>

    <el-dialog title="课程内容" :visible.sync="editorVisible" width="50%" :close-on-click-modal="false" destroy-on-close>
      <div v-html="viewData" class="w-e-text w-e-text-container"></div>
    </el-dialog>

  </div>
</template>

<script>
import E from 'wangeditor'
export default {
  name: "Course",
  data() {
    return {
      editor: null,
      tableData: [],  // 所有的数据
      pageNum: 1,   // 当前的页码
      pageSize: 10,  // 每页显示的个数
      total: 0,
      courseName: null,
      fromVisible: false,
      editorVisible: false,
      form: {},
      user: JSON.parse(localStorage.getItem('xm-user') || '{}'),
      rules: {
        courseName: [
          {required: true, message: '请输入课程名称', trigger: 'blur'},
        ],
        credits: [
          {required: true, message: '请输入学分', trigger: 'blur'},
        ],
        courseTime: [
          {required: true, message: '请输入课程时间', trigger: 'blur'},
        ],
        courseContent: [
          {required: true, message: '请输入课程介绍', trigger: 'blur'},
        ],
      },
      ids: [],
      viewData: null
    }
  },
  created() {
    this.load(1)
  },
  methods: {
    initWangEditor(content) {
      this.$nextTick(() => {
        this.editor = new E('#editor')
        this.editor.config.placeholder = '请输入内容'
        this.editor.config.uploadFileName = 'file'
        this.editor.config.uploadImgServer = 'http://localhost:9090/files/wang/upload'
        this.editor.create()
        setTimeout(() => {
          this.editor.txt.html(content)
        })
      })
    },


    del(courseId) {   // 单个删除
      this.$confirm('您确定删除吗？', '确认删除', {type: "warning"}).then(response => {
        this.$request.delete('/course/delete/' + courseId).then(res => {
          if (res.code === '200') {   // 表示操作成功
            this.$message.success('操作成功')
            this.load(1)
          } else {
            this.$message.error(res.msg)  // 弹出错误的信息
          }
        })
      }).catch(() => {
      })
    },
    handleSelectionChange(rows) {   // 当前选中的所有的行数据
      this.ids = rows.map(v => v.courseId)   //  [1,2]
    },
    delBatch() {   // 批量删除
      if (!this.ids.length) {
        this.$message.warning('请选择数据')
        return
      }
      this.$confirm('您确定批量删除这些数据吗？', '确认删除', {type: "warning"}).then(response => {
        this.$request.delete('/course/delete/batch', {data: this.ids}).then(res => {
          if (res.code === '200') {   // 表示操作成功
            this.$message.success('操作成功')
            this.load(1)
          } else {
            this.$message.error(res.msg)  // 弹出错误的信息
          }
        })
      }).catch(() => {
      })
    },
    load(pageNum) {  // 分页查询
      if (pageNum) this.pageNum = pageNum
      this.$request.get('/course/selectPage', {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          courseName: this.courseName,
        }
      }).then(res => {
        this.tableData = res.data.records
        this.total = res.data.total
      })
    },
    reset() {
      this.courseName = null
      this.load(1)
    },
    handleCurrentChange(pageNum) {
      this.load(pageNum)
    },
  }
}
</script>

<style scoped>

</style>
